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Delete a large list of files

Posted on 2012-03-27
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Last Modified: 2012-04-16
Hi All,

I'm trying to delete bad file archive stubs so they can be restored from backup. I have a 80 meg list of 800,000 files with full local path I need deleted. It works, just need it to be smoother, logging, no errors etc.

Ideally I want to get-content from a txt file then remove-item with -LiteralPath switch as . Obviously avoiding errors escape characters and spaces in directory names as well, and any logging of errors would alos be great though I know this may not be possible.

Originally we have a powershell simple script that looked like this.

get-content "c:\deletelist.txt" | Remove-Item

This works well with a few files that don't have [1] in file name or spaces or escape keys, but using this command with the -LiteralPath option to sidestep this seems impossible to my feeble mind.



Can anyone suggest a way they would do this? Much appreciation in advance.
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Question by:MC2010
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6 Comments
 
LVL 13

Expert Comment

by:Yagya Shree
ID: 37774620
Please look into this codeplex solution

http://bulkfilemanager.codeplex.com/
0
 
LVL 8

Expert Comment

by:Brent Challis
ID: 37774953
A PowerShell soultion, with simple logging follows.  Here is a link to a more complex logging process
http://powershell.com/cs/media/p/10676.aspx


function Log-Message
{
    Param
    (
        $LogFileName,
        $Message
    )
    ("{0} {1}" -f (Get-Date), $Message) | Out-File $LogFileName -append
}

$logFile = "c:\DeleteFiles\log.txt"
$files = get-content "C:\DeleteFiles\deletelist.txt"
$count = 0
Log-Message $logFile "Starting deletions"
foreach ($file in $files)
{
    if (Test-Path $file)
    {
        try
        {
            Remove-Item -LiteralPath $file
            Log-Message log.txt "Deleted $file"
            $count++
        }
        catch
        {
            Log-Message $logFile ("There was a problem deleting {0}: {1}" -f $file, $_.Message )
        }
    }
    else
    {
        Log-Message $logFile "File $file not found"
    }
}

Log-Message $logFile ("Completed deleting {0} files" -f $count)
0
 
LVL 1

Author Comment

by:MC2010
ID: 37779659
bchallis : While this is a brilliant script, it still does error out on filenames containing [1] eg doc1[1].doc and reports "cannot find file" this should be fixed by using  -LiteralPath, but as my simple script. it doesn't seem to work.
0
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LVL 8

Expert Comment

by:Brent Challis
ID: 37779759
I changed to Test-Path line to
    if (Test-Path -LiteralPath $file)

and it worked when I tested it.  Can you try this?

Cheers.
0
 
LVL 8

Accepted Solution

by:
Brent Challis earned 2000 total points
ID: 37779858
I just noticed that I missed a modification to my code to use a variable for the file name of the logfile so I am included the updated version here -  with the test for the files existence included.  Also if you want more sophisticated logging than the simple Log-Message function i included, here is a link to some loggin functions that I have written:
http://www.ddls.net.au/blog/2012/03/logging-in-powershell/

function Log-Message
{
    Param
    (
        $LogFileName,
        $Message
    )
    ("[{0}] {1}" -f (Get-Date), $Message) | Out-File $LogFileName -append
}

$logFile = "c:\DeleteFiles\log.txt"
$files = get-content "C:\DeleteFiles\deletelist.txt"
$count = 0
Log-Message $logFile "Starting deletions"
foreach ($file in $files)
{
    if (Test-Path -LiteralPath $file)
    {
        try
        {
            Remove-Item -LiteralPath $file
            Log-Message $logFile "Deleted $file"
            $count++
        }
        catch
        {
            Log-Message $logFile ("There was a problem deleting {0}: {1}" -f $file, $_.Message )
        }
    }
    else
    {
        Log-Message $logFile "File $file not found"
    }
}

Log-Message $logFile ("Completed deleting {0} files" -f $count)
0
 
LVL 1

Author Closing Comment

by:MC2010
ID: 37854127
Excellent! thank you very much for your experience here. It has cured my problem and saved us alot of problems. Well done.
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